CVE-2026-28377
Grafana Tempo has Inadequate Encryption Strength
7.5
HIGH
CVSS 3.1
EPSS 0.01%
Description
A vulnerability in Grafana Tempo exposes the S3 SSE-C encryption key in plaintext through the /status/config endpoint, potentially allowing unauthorized users to obtain the key used to encrypt trace data stored in S3. Grafana thanks william_goodfellow for reporting this vulnerability.
How to fix CVE-2026-28377
To remediate CVE-2026-28377, upgrade the affected package to a fixed version below.
- —upgrade to 2.10.3 or later
Is CVE-2026-28377 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.10.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |